@Test
 public void addMultipleGenerics() throws ClassNotFoundException {
   JavaClassSource javaClass = Roaster.create(JavaClassSource.class);
   javaClass.setPackage("it.coopservice.test");
   javaClass.setName("SimpleClass");
   javaClass.addTypeVariable().setName("I");
   javaClass.addTypeVariable().setName("O");
   Assert.assertTrue(javaClass.toString().contains("<I, O>"));
   javaClass.removeTypeVariable("I");
   Assert.assertTrue(javaClass.toString().contains("<O>"));
 }
 @Test
 public void addAndRemoveGenericType() throws ClassNotFoundException {
   JavaClassSource javaClass = Roaster.create(JavaClassSource.class);
   javaClass.setPackage("it.coopservice.test");
   javaClass.setName("SimpleClass");
   javaClass.addTypeVariable().setName("T");
   Assert.assertTrue(javaClass.getTypeVariables().get(0).getBounds().isEmpty());
   Assert.assertTrue(javaClass.toString().contains("<T>"));
   javaClass.removeTypeVariable("T");
   Assert.assertFalse(javaClass.toString().contains("<T>"));
 }